Factor of safety (coefficient of utilization)

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Appendix E
Appendix E
Factor of safety (coefficient of utilization)
E.1. Wire rope 1
E.1.1. For a wire rope used in the construction of a sling or
forming part of a derrick, derrick crane or crane on board ship, the
factor of safety should be: 2
in the case of a wire rope forming part of a sling:
in the case of a wire rope forming an integral part of a derrick,
etc.:
E.1.2. For a wire rope forming part of a crane other than on
board ship, the factor of safety should be:
1See Chapter 4, section 4.4.3, in particular para. 2.
2In the case of multi-legged slings, this is the safe working load of
the complete sling.
Safe working load of the sling (SWL)2Factor
Up to and including 10 tonnes 5
Over 10 tonnes up to and including
160 tonnes 10,000
(8.85 × SWL) + 1,910
Over 160 tonnes 3
Safe working load of the derrick,
derrick crane, etc. (SWL)
Factor
Up to and including 160 tonnes 10,000
(8.85 × SWL) + 1,910
Over 160 tonnes 3

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